<template>
    <HomePanel title="热门品牌" sub-title="国际经典 品质保证">
        <template v-slot:right>
            <a @click="toggle(-1)" href="javascript:;" :class="{disabled:index==0}" class="iconfont icon-angle-left prev"></a>
            <a @click="toggle(1)" href="javascript:;" :class="{disabled:index==1}" class="iconfont icon-angle-right next"></a>
        </template>
        <div class="box" ref="target">
            <Transition name="fade">
                <ul v-if="brands.length" class="list" :style="{transform:`translateX(-${index*1024}px)`}">
                    <li v-for="item in brands" :key="item.id">
                        <RouterLink to="/">
                            <img v-lazy="item.picture" alt="" />
                        </RouterLink>
                    </li>
                </ul>
                <div v-else class="skeleton">
                    <XtxSkeleton class="item" v-for="i in 5" :key="i" animated bg="#e4e4e4" width="240px" height="305px"/>
                </div>
            </Transition>
        </div>
    </HomePanel>
</template>

<script>
import { ref } from 'vue';
import HomePanel from "./home-panel";
import { findBrand } from '@/api/home';
import { useLazyData } from "@/hooks";
export default {
    name: "HomeBrand",
    components: { HomePanel },
    setup(){
        // 获取数据
        // const brands = ref([])
        // findBrand(10).then(data => {
        //     brands.value = data.result;
        // })
        // 注意：useLazyData 需要API函数 如果遇到需要传参的情况 自己写个函数
        const { target,result } = useLazyData(()=>findBrand(10))
        // 切换效果 0 是第一页 1 是第二页
        const index = ref(0)
        const toggle = (step)=>{
            const newIndex = index.value + step;
            if (newIndex < 0 || newIndex > 1) return
            index.value = newIndex
        }
        return {
            brands:result,
            toggle,
            index,
            target
        }
    }
};
</script>

<style scoped lang='less'>
 .skeleton {
    width: 100%;
    display: flex;
    .item {
        margin-right: 10px;
        &:nth-child(5n) {
            margin-right: 0;
        }
    }
  }
.home-panel {
    background: #f5f5f5;
}
.iconfont {
    width: 20px;
    height: 20px;
    background: #ccc;
    color: #fff;
    display: inline-block;
    text-align: center;
    margin-left: 5px;
    background: @xtxColor;
    &::before {
        font-size: 12px;
        position: relative;
        top: -2px;
    }
    &.disabled {
        background: #ccc;
        cursor: not-allowed;
    }
}
.box {
    display: flex;
    width: 100%;
    height: 345px;
    overflow: hidden;
    padding-bottom: 40px;
    .list {
        width: 200%;
        display: flex;
        transition: all 1s;
        li {
            margin-right: 10px;
            width: 240px;
            &:nth-child(5n) {
                margin-right: 0;
            }
            img {
                width: 240px;
                height: 305px;
            }
        }
    }
}
</style>
